(1) Take your ID card and bank card to any local outlet to withdraw money, or withdraw your card for cash withdrawal.
(2) swiping a card on a POS machine with flash payment function does not require a password or a card.
Extended data
Electronic cash:
(1) is actually a technology to simulate cash in electronic form. E-cash system attempts to copy the characteristics of cash for online transactions in many aspects: convenience, low cost (or no transaction cost).
(2) Anonymity and other attributes. However, not all electronic cash systems meet these characteristics, and most electronic cash systems can provide convenience for small online transactions.
System scheme
The basic process of electronic cash design is as follows:
Exit agreement
1. withdrawal protocol: users withdraw electronic cash from their bank accounts. In order to obtain legal electronic cash with bank signature on the premise of ensuring users' anonymity, users will interact with banks to realize blind signature protocol, and banks must be sure that electronic cash contains the necessary user identity. General withdrawal agreements are divided into the following two-step agreements:
* Account opening agreement. This step is usually computationally intensive and is used to provide users with an electronic license containing their identity information.
* Withdraw from the agreement. This step is just a simple blind signature process, and users can withdraw electronic cash from their accounts.
payment agreement
2. Payment agreement: users use electronic cash to buy goods from stores. It is usually divided into two sub-protocols:
* Verify the signature of electronic cash, which is used to confirm whether electronic cash is legal.
* Knowledge disclosure agreement. Buyers will disclose some of their identity information to sellers to prevent buyers from abusing electronic cash.
Deposit agreement
3. Deposit agreement: users and businesses deposit electronic cash into their bank accounts. In this step, the Bank of China will check whether the deposited electronic cash is legally used. If illegal use is found, the bank will use reuse detection protocol to track the identity of illegal users and punish them.
Baidu Encyclopedia: Electronic Cash